High strength dental material

Abstract

The invention provides a high strength dental composition including polymerizable dental resins. The dental composition is useful as restorative material and for making various dental devices, such as artificial teeth, crowns and bridges of high strength dental polymeric material.

The invention claimed is: 
     
       1. A dental component comprising a composition wherein the dental component exhibits a flexural modulus of at least 400,000 psi and a flexural strength of at least 20,000 psi and wherein the composition comprises:
 about 1 to about 99% wt of one or more urethane di or multi(meth)acrylate derivatives of 1,3-bis(isocyanatomethyl)cyclohexane characterized by one of the following formulas: 
 
       
         
           
           
               
               
           
         
         in which:
 X is oxygen, nitrogen, or NR 1 , where:
 R 1  is hydrogen, a C1-C14 alkyl group, a C6-C14 cyclic group, C1-C14 cyclic alkyl group, a C6-C14 aromatic group, a C1-C14 aromatic alkyl group, or any combination thereof; 
 
 R 2 , R 3 , R 4  and R 5  is hydrogen, a C1-C14 alkyl group, a C6-C14 cyclic group, C1-C14 cyclic alkyl group, a C6-C14 aromatic group, a C1-C14 aromatic alkyl group, or any combination thereof; 
 Y is a C1-C14 alkyl group, a C6-C14 cyclic group, a C1-C14 cyclic alkyl group, a C6-C14 aromatic group, a C1-C14 aromatic alkyl group, or any combination thereof; 
 A and B independently of each other stand for one of the following formulas: 
 
       
       
         
           
           
               
               
           
         
         where:
 R 6  and R 7  is hydrogen, a C1-C14 alkyl group, a C6-C14 cyclic group, a C1-C14 cyclic alkyl group, a C6-C14 aromatic group, a C1-C14 aromatic alkyl group, or any combination thereof, which can be interrupted by oxygen or sulfur; 
 R 8  and R 9  is a C1-C12 difunctional alkylene, a C1-C12 alkyl group, a C6-C12 cyclic group, a C1-C12 cyclic alkyl group, a C6-C12 aromatic group, a C1-C12 aromatic alkyl group, or any combination thereof, which can be interrupted by oxygen or sulfur; 
 R 10  is hydrogen, a C1-C14 alkyl group, a C6-C14 cyclic group, a C1-C14 cyclic alkyl group, a C6-C14 aromatic group, a C1-C14 aromatic alkyl group, or any combination thereof, which can be interrupted by oxygen or sulfur, 
 R 11  represents a C1-C14 difunctional alkylene, a C1-C14 alkyl group, a C6-C14 cyclic group, a C1-C14 cyclic alkyl group, a C6-C14 aromatic group, a C1-C14 aromatic alkyl group, or any combination thereof, which can be interrupted by oxygen or sulfur; and 
 R 12  represents a C1-C8 trifunctional alkyl group, which can be interrupted by oxygen or sulfur, or otherwise atoms; and 
 
         about 0.001 to about 10% wt of an initiator for the radical polymerization. 
       
     
     
       2. A dental component according to  claim 1 , wherein the composition further comprises about 5% to about 95% of at least one filler. 
     
     
       3. A dental component according to  claim 1 , wherein the composition includes about 10% to 50% wt of one or more of the urethane di or multi(meth)acrylate derivatives. 
     
     
       4. A dental component according to  claim 2 , wherein the composition includes about 15% to 40% wt of one or more of the urethane di or multi(meth)acrylate derivatives; about 30% to about 90% wt fillers; and 0.005% to about 5% of an initiator for the radical polymerization. 
     
     
       5. A dental component according to  claim 1 , wherein A and B are the same. 
     
     
       6. A dental component according to  claim 2 , wherein the dental component exhibits a flexural modulus of at least 800,000 psi and a flexural strength of at least 22,000 psi. 
     
     
       7. A dental component according to  claim 1 , wherein the composition is substantially free of a filler. 
     
     
       8. A dental component according to  claim 7 , wherein the dental component exhibits a flexural modulus of at least 450,000 psi and a flexural strength of at least 24,000 psi. 
     
     
       9. A dental component according to  claim 2 , wherein dental component exhibits a flexural modulus of at least 1,000,000 psi and a flexural strength of at least 26,000 psi. 
     
     
       10. A dental component according to  claim 2 , wherein the at least one filler is present in an amount of:
 about 30 to about 90% wt. 
 
     
     
       11. A dental component according to  claim 10 , wherein the one or more urethane di or multi(meth)acrylate is present in an amount of about 10 to about 50% wt.